Tanard Jackson, speaking to reporters in Ashburn in Aug. 2012. (Alex Brandon/Associated Press)

Washington Redskins safety Tanard Jackson has once again been suspended indefinitely by the NFL for violating the league’s substance-abuse policy.

The team issued a statement from an NFL spokesperson announcing the news Wednesday afternoon.

Jackson in May received reinstatement from the league after he missed the past two seasons while serving an indefinite suspension as a repeat offender, as in 2012 he failed multiple tests for marijuana use.

Jackson signed with Washington in 2012 but never played a game because of his drug suspension. He has played five NFL seasons, all with the Buccaneers. While with Tampa in 2010, Jackson was suspended indefinitely for violating the substance-abuse policy and missed all but two games that season. He also missed six games in 2011. In 2009, he was suspended for drug use and missed four games.

Related: Previous Insider posts on Tanard Jackson | Jackson’s career stats

Jackson in May claimed to have learned his lesson and said that he knew he had likely used up all his second chances.

He claimed to have changed his lifestyle and that working in a warehouse the past two years served as plenty of motivation to stay out of trouble.

“That long wait,” he said when asked what would make this comeback different. “That time period I was out from doing something I love to do, and not having that camaraderie with the teammates and not having that for that long, and having to go out and work in the warehouse from 9 to 5, it’s a humbling experience.”

Jackson added, “I have things I have to do as far as with the NFL and what I have to do as far as complying to things. Those things right there are enough to keep me. A lifestyle change is necessary any time you’re in a position like that. With the support of good people and keeping good people around me in tough times, keeping those people around me is definitely important.”

It wasn’t clear when Jackson, who had worked as a third-strong safety for much of the offseason, failed his latest test. Because of the lack of stability at safety for Washington, Jackson had a chance to contribute this year, though.

Redskins coaches and officials always spoke with reservation, however, when asked if they could count on him for the coming season.

Have a Redskins question? Send an e-mail to mike.jones@washpost.com with the subject line “Mailbag question,” and it might be answered on Tuesday in The Mailbag.

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